Lamp-chimney



J. T. BARROW. LAMP GHIMNEY.

No. 351,825. I Patented Nov. 2, 1886.

UNITED STATES PATENT OFFICE.

JQHN T. ,BARROVV, CHICAGO, ILLINOIS.

LAMP-CHIMNEY.

SPECIFICATION forming part gf Letters Patent No. 351,825, dated November2, 1886.

Application tiled March 22, 1886. Serial No. 196,058. (No model.)

.To all whom it may concern:

Be it known that I, JOHN T. BARROW, of Chicago, Illinois, have inventedcertain new and useful Improvements in Lamp-Chimneys, of which thefollowing is a specification.

The object is to furnish a chimney made partially of metal and partiallyof glass, and provided with means for adjusting the draft; and theinvention consists in the parts and features hereinafter described andclaimed.

The accompanying drawings illustrate the same. Y

Figure 1 is a perspective view. Fig. 2 is ya vertical and Fig. 3 ahorizontal section.

The chimney consists of a base portion, A, which is partially covered bya flat top, A', havinga large opening in the center. On this is mounteda rectangular frame, consisting of uprights B, fastened to the topplate, and connectedat the top by bars B'. On top of the frame is a cap,C, which is formed of a plate made to cover a large part of the upperopening of the frame, but leaving an opening in the center somewhatsmaller than the opening in plate A', and of vertical sides surroundingthe opening and carrying it farther upward, like a line. At the uppercorners these sides are slit or beveled, as at c, so that the tops maybe bent yin more or less, to contract or vary the size of the opening,for a purpose hereinafter explained. Thecap is preferably hinged totheends of two of the side bars, as at b, so that it may be swung off thetop of the frame. When so hinged, the top bar may be omitted from theside to which the cap is hinged.

All the'parts thus far described are made of metal, preferably of brass,and the base portion A is .adapted to fit onto the ordinary burner of akerosene-lamp, -so that the central part of the burner holding the wickwill project up about even with the plate A', the fiame rising above it.

The uprights B are made of flat pieces bent to form side iianges, b. Onthe inside they are provided with` projecting lugs or lips b", adaptedto hold sectionsof glass D, or other transparent substance, cut to tbetween the uprights. When the cap C is removed or turnedback, thesections may be insertedfrom thel top, being slipped in with the edgesbetween the flanges and lips, or taken out for cleaning. Vhen desirable,a renector may be substituted for or placed back of one of the -samewidth of wick, may be varied. If the top is opened to its full capacity,by bending the beveled parts ont to a vertical vposition the volume ofair-draft will be increased, and the name be thereby made narrower andhigher, but if, on the other hand, the opening at the top is contracted,the air is thus regulated, and the flame is thereby made wider and notso high as under the condition first mentioned. Whatever be the theory,the varying of the size of the chimney-opening at the top produces theabove-named effects on the fiame, and the advantage of better adaptingthe draft to any given size of flame is afforded by the use They are,moreover, not so liable to be broken by the heat as a chimney made ofone piece of glass, because the sections are permitted to eX- pandseparately. The metal portion, when made of polished brass orornameuted,presents a very handsome appearance. For the purpose ofornamentation, additions may be put `on any of the parts, as byextending the cap farther down over the bars B', and curving orfilagreeing it in any fanciful manner; also by extending the slitportion of the cap further upward and curving the extended portionoutward in any'tasty way. Such ornamentation, however, shouldnot changethe essential structl nre, and would not constitute any part of theinvention. For the purpose of relieving the cap somewhat from the heatof the flame, one of the sections D may be made shorter than the rest,as seen at d, to allow the cool air to pass in under the cap.

It will be observed that the advantages secured by the cap provided withmeans for varying the sizeof the chimney-opening at the sections areeasily made, and at trifling cost.

IOC)

top would be produced by such cap in combi- 2. The combination ofalamp-ohimney with nation with any eonnnou form of chimney, the a cap,as G, of sheet metal, having upwardlycap being merel y fitted to the topof the projecting sides surrounding the air-passage chimney. at; the topof the chimney, provided with slits 5 XVhab is elai med isn c, as andfor the purpose specified.

l. As an lmprovenlent 1n lailip-vclillnneys, JOHN T. BARROV.

the combination of the metal base A, plate A',

uprights B, bars B', cap C, with slits c at the Xlfitnesses:

top, and transparent sections D, substantially JNO. H. VVHIPPLE, 1o asand for the purposes specified. l JAMES R. DEAN.

